7. Distance Coefficient Ratio
P.8
Infrared Thermometer
TM0819
8. Emissivity and Infrared Temperature
Measurement Principle
The distance coefficient ratio of this product is 12.1. For example, if the object to be measured is 72cm far from
the instrument, then the diameter of the object must be larger than 6cm. It can measure proper distance but can
be influenced by other light source.
Infrared thermometer is an instrument that measures the surface temperature. It is through infrared emission,
reflection and then converted into energy. Thermometer converts the electrical signals into temperature reading
displayed on the LCD.
The infrared energy released is in direct proportion with its temperature and emissive power. This is called
emissivity. It is related to the material and gloss of the object. The emissivity value ranges from 0.1 to 1.0.
The emissivity of most organic material; paint and the surface be oxidized is 0.95. If there is a problem please set
the emissivity to be 0.95.
